Circuit Diagram and Explanation: In this Arduino Alcohol Detector Shield we have used a MQ3 sensor to detect present alcohol level in the breath. A 16x2 LCD is used for displaying the PPM Value of ...

An Arduino-based system to detect alcohol and timestamp the event with a buzzer alert. 📖 About The Alcohol Detection System with Buzzer and Timestamp is a DIY project designed for detecting the ...

Prevent drunk driving and overspeeding with Arduino. Detects alcohol and speed; stops car if alcohol's high, slows if overspeeding. Components: LCD, buzzer, LEDs, motor driver, speed & alcohol sensors ...

DIY Alcohol Breath Analyzer – Circuit. Fig. 2 shows the circuit diagram of the alcohol detector. The circuit includes an Arduino Uno board (MOD1), four LEDs (L1 through L4), two buzzers (B1 through B2 ...